Multiple choice technology databases

Data transformation includes which of the following?

  1. A process to change data from a detailed level to a summary level

  2. A process to change data from a summary level to a detailed level

  3. Joining data from one source into various sources of data

  4. Separating data from one source into various sources of data
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A Correct answer
Explanation

Data transformation includes converting detailed data into summarized data, such as aggregating transaction-level data into daily or monthly totals. The other options are incorrect: transformation doesn't convert summary to detail, join from one to various sources, or split data arbitrarily. Aggregation is a core transformation function.

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